Slow Cooker Beef Stroganoff With Mushrooms

Name: Slow-Cooker Beef Stroganoff With Mushrooms
Ingredients: 2 pounds beef chuck stew meat; 1 red onion, diced; 8 ounces cremini mushrooms, sliced; 1 (10.75-ounce) can condensed cream of mushroom soup; 1/4 cup Worcestershire sauce; Salt and pepper, to taste; 8 ounces sour cream; 12 ounces egg noodles, cooked, for serving; 1/4 cup fresh parsley, roughly chopped